SINGLE-CHIP OFF-AXIS MAGNETORESISTIVE Z-X ANGLE SENSOR AND MEASURING INSTRUMENT

Title:

SINGLE-CHIP OFF-AXIS MAGNETORESISTIVE Z-X ANGLE SENSOR AND MEASURING INSTRUMENT

Document Type and Number:

WIPO Patent Application WO/2016/026419

Kind Code:

A1

Abstract:

A single-chip off-axis magnetoresistive Z-X angle sensor and measuring instrument. The single-chip off-axis magnetoresistive Z-X angle sensor comprises a substrate (1) located on an X-Y plane, at least one X-axis magnetoresistive sensor (3) and at least one Z-axis magnetoresistive sensor (2), the X-axis magnetoresistive sensor (3) and the Z-axis magnetoresistive sensor (2) being located on the substrate (1). The X-axis magnetoresistive sensor (3) and the Z-axis magnetoresistive sensor (2) each comprise magnetoresistive sensing units (5) and a flux concentrator (4), the magnetoresistive sensing units (5) being electrically connected into a magnetoresistive bridge comprising at least two bridge arms. The Z-axis magnetoresistive sensor (2) is a push-pull bridge structure, a push arm and a pull arm of the push-pull bridge structure being respectively located at positions equidistant from a Y-axis central line of the flux concentrator (4). The X-axis magnetoresistive sensor (3) is a reference bridge structure, a reference arm and a sensitive arm of the reference bridge structure being respectively located on the Y-axis central line of the flux concentrator (4) and a position more than half of the width of the flux concentrator (4) away from the Y-axis central line. The single-chip off-axis magnetoresistive Z-X angle sensor is placed at an edge of a circular permanent magnet encoding disc and forms an angle measuring instrument, angle measurement is achieved by measuring X-axis and Z-axis magnetic field components, the structure is compact and sensitivity is high.

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Inventors:

DEAK JAMES GEZA (CN)
ZHOU ZHIMIN (CN)

Application Number:

PCT/CN2015/087320

Publication Date:

February 25, 2016

Filing Date:

August 18, 2015

Export Citation:

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Assignee:

MULTIDIMENSION TECHNOLOGY CO LTD (CN)

International Classes:

G01B7/30

Foreign References:

CN204043604U	2014-12-24
CN104197828A	2014-12-10
CN102297652A	2011-12-28
CN102298124A	2011-12-28
CN102419425A	2012-04-18
US20110068780A1	2011-03-24
JP2000321014A	2000-11-24

Other References: